Trip wall-packer for oil-wells.



W. PALM.

TRIP WALL PACKER FOR OIL WELLS.

APPLICATION FILED JAN. 9, 1909.

Patented Dec. 7, 1909.

M n 8 4- 4A WW In M 6 I M -AA I] k m HM 55 4 A 0 a 4AA E \A A WILLIAM PALM, OF BUTLER, PENNSYLVANIA.

TRIP NALL-PACKER FOR OIL-WELLS.

Specification of Letters Patent.

Patented Dec. 7, 1999.

Application filed. January 9, 1909. Serial No. 471,521.

To all whom it may concern:

Be it known that I, VVILLIAM PALM, a citizen of the United States of America, residing at Butler, in the county of Butler and State of Pennsylvania, have invented certain new and useful Improvements in Trip all-Packers for Oilells, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to a trip wall packer for oil wells, and the object of the invention is to provide a packer that will automatically seal or pack out fluid or gas above or below the packer.

To this end, I have devised a packer compris ng slips for holding the packer in a hole and a sleeve of rubber or resilient material above the slips, the weight of the tubing on the sleeve causing said sleeve to engage the walls of the hole and form an air and water tight connection. The packer is so designed that it can be easily removed and reset at different locations.

The detail construction of my invention will hereinafter be described and then specifically pointed out in the appended claims.

In the drawings :-Figure 1 is an eleva- -tion of the packer ready to be placed in a 2 shows the packer after being partially rotated, and Fig. 3 illustrates the packer after the tubing has been lowered sutliciently to cause the slips to frict-ionally engage the walls.

In the accompanying drawings, 1 designates a tube or body upon which the packer is constructed. The upper end of this tube or body is exteriorly threaded as at '2, for a collar 3 into which the tubing (not shown) of the hole 'is screwed. The lower edge of the collar 2 is provided with an annular groove 4 to receive the upper end of a cylindrical elastic packer 5 placed upon the tube or body 1, said packer being preferably made of rubber. The lower end of the packer 5 extends into an annular groove (3 of a cone or tapering metallic sleeve 7 movably fitted on the tube or body 1. Encircling the tube or body 1 below the sleeve 7 is a ring 8 having four equally spaced upwardly extending slips 9, said slips having the upper ends thereof enlarged and the inner sides thereof beveled, as at 10, to engage the sleeve 7, while the outer sides are serrated or roughened, as at 10 to engage the wall of a hole.

hole. Fig.

Secured to the ring 8, as at 11, are bow springs 12 and 13 adapted to normally hold the slips 9 in engagement with the sleeve 7 The springs 12 are oppositely disposed and are provided with rearwardly projecting resilient latches 1 1.

Screwed upon the lower end of the tube or body 1 below the ring 8 is a collar 16, which can be interiorly threaded, for other connections. The collar 16 is provided at the upper edge thereof with an annular beveled enlargement 17 provided with oppositely disposed slots 18 and with oppositely disposed notches 19, these notches being provided in the lower edge of the enlargement 1'? adjacent to the slots 18 thereof.

When the packer is to be placed in a hole, the ring 8 is lowered until the latches 1-1 extend through the slots 18, said latches being constructed so as to snap over the collar 16 at any position, and then said ring is partially rotated to place the latches 14: in the notches 19 of the enlargements 17. This can also be accomplished by simply moving the ring 8 downwardly and springing the latches 1a over the beveled enlargement 1? to engage the notches 19. With the packer in the position shown in Fig. 1 of the drawings, said packer is lowered into the well hole at the lower end of the string of tubing. The tendency of the slips 9 to slide on the sleeve 7 is prevented by the latches 1 1 engaging the beveled enlargements 17. lVhen the desired depth is reached, the tubing is slightly raised, while the bow springs 12 engaging the wall of the hole hold the ring 8. With the tubing slightly raised, the latches 1a are free of the notches 19 and the enlargements 17, and the tubing can be partially rotated, while the springs 13 prevent the slips 10 from rotating. The tubing can then be lowered to place the packer in the position shown in Fig. 2 of the drawings. By further lowering the tubing, the sleeve 7 expands or forces outwardly the four slips 9 against the side of the wall and thereby locking said slips and the sleeves 7 in the hole. The tubing upon being further lowered causes the elastic packerb to buckle or expand and frictionally engage the sides of a wall. The weight of the tubing is sutlicient to maintain the packing in engagement with the wall, thereby automatically sealing or packing off fluid or gas above or below said packer.

The pin protrudes from the collar 16 for the purpose of preventing the packer from setting prematurely, also allowing the packer to be rotated as far as possible in the reverse direction without locking.

Should it be desired to reset a packer at some other depth in the hole, it is accomplished as follows: The tubing is raised until the latches 14: engage the beveled enlargements 17. The tubing is then lowered, drawing the slips downwardly from the sleeve 7 and allowing the contraction of the packer 5 to lower said sleeve and the parts assume their normal position as shown in Fig. l of the drawings. After the desired location is found, the packer is set as previously described.

Having now described my invention what I claim new, is

1. In a trip wall packer, the combination with a tube, a collar fixed to the upper end of said tube, an expansible packer surrounding said tube and having the upper end thereof engaging said collar, a tapering sleeve said collar and tapering sleeve movably fitted upon said tube for engaging the lower end of said packer, a ring encircling said tube below said sleeve, slips carried by said ring for engaging said sleeve, bow springs connected to said ring for normally holding said slips in engagement with said sleeve, latches carried by the lower ends of two of said springs, a collar mounted upon said tube below said ring and having an annular beveled enlargement for engaging said latches and holding said slips in a retracted position during the setting of said packer, said last-named collar being rotated to release said latches, and permit said slips to engage the wall of a hole and hold said sleeve to expand said packer, substantially as, and for the purpose described.

2. In a trip wall packer, the combination with a tube, a collar fixed to the upper end of said tube, an expansible packer surrounding said tube and having the upper end thereof engaging said collar, a tapering sleeve movably fitted upon said tube for engaging the lower end of said packer, a ring encircling said tube below said sleeve, slips carried by said ring for engaging said sleeve, bow springs connected to said ring for normally holding said slips in engagement with said sleeve, latches carried by the lower ends of two of said springs, and a collar mounted upon said tube below said ring and having an annular beveled enlar 'ement for en a in said latches and G b 23 b holding said slips in a retracted position during the setting of said packer.

In testimony whereof I affix my signature in the presence of two witnesses.

WVILLIAM PALM. Vitnesses A. F. CLARKE, K. D. CONNELLY. 

